naftoreiclag.splendidanimator.EasyGraphics.java Source code

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Here is the source code for naftoreiclag.splendidanimator.EasyGraphics.java

Source

/* Copyright (c) 2014 "Naftoreiclag" https://github.com/Naftoreiclag
 *
 * Distributed under the MIT License (http://opensource.org/licenses/mit-license.html)
 * See accompanying file LICENSE
 */

package naftoreiclag.splendidanimator;

import java.util.LinkedList;
import java.util.List;

import org.lwjgl.LWJGLException;
import org.lwjgl.opengl.Display;
import org.lwjgl.opengl.DisplayMode;
import org.lwjgl.opengl.GL11;

import static org.lwjgl.opengl.GL11.*;

public abstract class EasyGraphics {
    // Initializer
    protected void initialize(int dispW, int dispH) throws LWJGLException {
        // Make display
        Display.setDisplayMode(new DisplayMode(dispW, dispH));
        Display.setResizable(true);
        Display.create();

        // Set up OpenGL view port
        syncViewportAndDisplaySizes();
    }

    // Send the stuff to GPU and put on display
    protected void updateDisplay() {
        // If the view port is resized
        if (Display.wasResized()) {
            // Re-sync
            syncViewportAndDisplaySizes();
        }

        //
        clearGPU();

        // Draw stuff
        sendStuffToGPU();

        // Update the display
        Display.update();

        // Make sure we go at 60 FPS
        Display.sync(60);
    }

    //
    private void clearGPU() {
        GL11.glClear(GL11.GL_COLOR_BUFFER_BIT);
    }

    //
    abstract void sendStuffToGPU();

    // Cleanup
    protected void cleanup() {
        // Delete the display
        Display.destroy();
    }

    // Resize the display
    public void resizeDisplay(int dispW, int dispH) throws LWJGLException {
        Display.setDisplayMode(new DisplayMode(dispW, dispH));
    }

    //
    public int getDisplayWidth() {
        return Display.getWidth();
    }

    //
    public int getDisplayHeight() {
        return Display.getHeight();
    }

    // Sync stuff
    private void syncViewportAndDisplaySizes() {
        // Get the target size
        final int dispW = Display.getWidth();
        final int dispH = Display.getHeight();

        // Set image output size
        glViewport(0, 0, dispW, dispH);
        glLoadIdentity();

        // Reset projection matrix
        glMatrixMode(GL_PROJECTION);
        glLoadIdentity();

        // Set the coordinates of the display
        glOrtho(0.0f, dispW, dispH, 0.0f, 1.0f, -1.0f);

        // Reset model view
        glMatrixMode(GL_MODELVIEW);
        glLoadIdentity();
    }
}